Valve-actuating mechanism for fluid-pressure motors.



T. W. N|CHOLS. VALVE ACTUATING MECHANISM FOR FLUID PRESSURE MOTOR S I APPLICATION FILED SEPT- 3. l9l5- 5 1,203,6&5. Patented Nov; 7,1916.

2 SHEETSr-SHEET I.

T. WfNlCHOLS. VALVE ACTUATING MECHANISM FOR FLUID PRESSURE MOTORS.

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THOMAS WINTER NICHOLS,

or Garnsnnen, ENGLAND.

VALVE-ACTUATI'NG MECHANISM FOR FLUID-PRESSURE MOTORS.

Specification of Letters Patent.

Patented Nov. *3, i916.

Agapllcation filed September a, 1915. Serial No. 48,782.

To all whom it may concern:

Be it known that I, THOMAS Wm'rnn Nicirons, a subject of the King of England, residing at (lateshead, county of Durham, in England, have invented certain new and useful Improvements in Valve-[actuating Mechanism for l luid-l ressure Vlotors, of which the following is a specification.

his invention relates lJOdIHPI'OVLIHCHiZS in valve actuating mechanism for fluid pressure motors. The motor is of the type used for direct acting pumps and the like, in which no crank shaft is employed.

The object is to give a motion to the valverod, similar to that given by an eccentric, by mechanism actuated by the piston-rod of the motor, and the invention, broadly stated, comprises a rocking member connected to the valve-rod or equivalent and to a member adapted to be reciprocated on a. stationary element, the said rocking member being actuated by a lever or levers fulcrumcd on and en able of sliding movement relatively to said stationary element or to the piston-rod, whereby the latter in its movements first causes a movement of the rocking member away from the piston-rod followed by a sliding movement of the reciprocating, member on the stationary element, which results in the rocking member being brought to a position in its original plane but remote from its first position and thus actuating the valve.

Ihnbndimcnts of the invention are illustratcd in the accompanying drawings, in which-- Figure 1 is an elevation of one form of the improved mechanism with the piston-rod of the motor at the extreme upper limit of its stroke. Fin. 2 is a plan view of Fig. 1, and Fig. 3'is a similar view to Fig. 1 when the piston is at its lower limit of stroke. Fig. 4 is an elevation showing a modification. Fig. 5 is a sectional elevation showing a further luodiiicatimi. Fig. 6 is a plan view of Fig. 5, and Fig. 7 a detail view in section on line A--A of Fig. 5.

In the construction shown in Figs. 1 to 3, a stationary element such as a pillar 2 preferably of circular section for cai 'g-ying the motor is placed in the same plane, between, and parallel to, the pistonrod 3, and the valve actuator such as the rod 4 of said motor, and nearest the valve-rod although said pilla. 2 may be placed in anyother convenient position. At a suitable position the pillar is increased in diameter as shown at 5 and through this part, and at right angles to the plane of the rods, a swivel-pin 6 projects on both sides. On the pillar 2, between the latter and the iston-rod 3, is placed a reciprocable member comprising two sleeves f! and 8 which are spaced apart, with the swivel-pin 6 are connected together by a distance bolt 9 which, if necessary, may be adjustable. ()n the bolt is a sliding gudgeon 10 in the form of a sleeve with projecting pins 11 at each side, on which are mounted blocks 12 free to turn on said pins. On the side of each sleeve 7, 8 opposite to the connecting bolt 9 is a double eye, and links 13, 17 of suitable length, on the outside oteach eye connect said sleeves to double eyes on rings 16, 20 by pins 15 and 19 respectively. The two rings 16 and 20 are connected together by a distance-bolt 2.1, adjustable as to length it necessary. The distance bolt 21, rings 16, 20 and links 1.3, 17 constitute a rocking; member. The valve-rod 4 is connected by an eye and pin connection 22 to the upper end of the distance-bolt 21, and on the lat-- tcr is a sliding gudgcon 23 with a fixed pin 24 at each side. A gudgeon 25 with a swivelpin 26 is fixed on the piston-rod 3 by, means of set bolts 27 or other means and two actuating levers 28, one on eachside, are fixed to said pin 26 and pass through holes in the blocks .12 of the gudgreon 10 on the sleeve bolt 9 and also through the swivel-pin 6 in the pillar 2 and have their other ends 29 shaped to fit on the pins 24 of gudgeon 23 on bolt 21. I

The action'of the mechanism described is as follows: The gudgcon 25 on the pistonrod 3 is at its highest position when the piston is at the top of its stroke. this position being indicated in Fig. 1. The pivot 26 is obliged to travel ina vertical line 'as the,

piston-rod moves downward, so that the actuating levers 28 are forced through the sleeve gudgeon-blocks 12 and swivel-pin 6 in the. pillar, resulting in the gudgeon being forced outward thus moving the links 13, 17

up toward the horizontal. The swivel-pin (3 being hxcd becomes a fulcrum for the levers 2S. and the sleeve-gudgeon 10 is moved downward to the lower. sleeve 8. The

movement of the piston-rod still continuing, both sleeves 7 and 8 are moved downward on the pillar 2. When the actuating levers 28 have reached the half range, the links 13,

between them, and- 17 will be approximately horizontal, and the ring-gudgeon 23, at its extreme horizontal range. As said actuating levers continue to descend, the links will be turned upward until at the bottom of the range of the levers,

' v vided integral with block 32. In this case the actuating-levers 28 are pivoted on said pins 33, and free to slide through holes in the pins 26 and 6, their ends 29 being fitted on the pins 24. i

In the construction shown in Figs. 5, 6 and 7, the bracket 30, block 32 and adjusting screws 31 are also provided, but the block 32 has a loose through pin 34: free to slide horizontally in a slot 35 in said block. The ends of the pin 34 nass'through the actuating-levers 28. The pin 6 in the pillar 2 is fixed in enlargement 5 and the actuatinglevers 28 are .pivoted on the reduced ends of said-pin 6. In some cases a locking bolt may be provided to prevent the sleeves moving until the block 32 comes against either the top or bottom sleeve or its adjusting screws. A suitable arrangement is shown in Figs. 5 and 7, where 36 is a bolt working in the pin 6 and pillar enlargement 5 against a spring 37 the bolt having a tapered'head 38 with projections 39 adapted to fit into recesses 4 0 in the face of bracket 30. As the block 32 passes over the tapered head of the bolt the latter is forced back until the projections 39 40 leave the recesses 40, whereupon the bracket 30 is free to move with respect to the pillar 2 until the opposite end of movement is attained, when it is again locked.

he remaining reference characters in Figs. 4 to 7 designate corresponding parts to those described with reference to Figs. 1 to 3. The mechanism described can also be used on ordinary engines with crank shafts, the gudgeon 25 being fixed either directly or indirectly on or to the piston-rod.

Details of construction described above may be modified within limits prescribed by the appended claims to suit particular cases and give the same'result without-departing from the spirit of the invention.

at I claim as my, invention and desire to secure by Letters Patent of the United States is F 1. .In valve actuating mechanism for fluid pressure motors, the combination of a stationary element, apiston-rod and a valve actuator in planes substantially parallel to said element, a rectilinearly reciprocatable member on said stationary element, a rocking 35 member connected to the valve actuator and to said reciprocatable member, and an actuating lever fulcrumed in said stationary element and in operative connection with the piston-rod, rocking member and reciproeatable member.

2. In valve actuating mechanismior fluid pressure motors, the combination a Silt tionary element, a piston-rod and a valve rod disposed in planes substantially parallel to said element,"a member rectilinearly reciprocatable on said element, a sliding gudgeon carried by said reciprocatable member, a rocking member connected to the valverod and to said reciprocatable member, and an actuating lever fulcrume'cl on said ele ment, in operative connection at opposite ends with the piston-rod and rocking member', respectively and intermediate said ends with said sliding gudgeon.

3. In a valve actuating mechanism for fluid pressure motors, the combination of a stationary element, a piston-rod and a valve actuator disposed in planes substantially parallel to said element, a 'rectilinearly reciprocatable member mounted on said sta 5 tionary element,-a'rocking member connected to the valve actuator and to said reciprocatable member, a sliding gudgeon carried by the latter,'and a valve actuating lever fulcrumed on said stationary element and in operative connection with said piston-rod,

rocking member and gudgeon, said lever being also in sliding relation with said sliding gudgeon,

4. In valve actuating mechanism for fluid pressure motors, the combination of a stationary element, a piston rod and valve actuator disposed in planes substantially parallel to said element, a rectilinearly reciprocatable member mounted on said stationary element, a rocking member including interconnected links pivoted to said reciprocatable member and t5 the valve actuator, and a valve actuating lever, pivotally connected to said rocking member, fuldrumed on the stationary element and operativeiy connected to the piston-rod and reciprocatable member.

5. In valve actuating mechanism for fluid pressure motors, the combination of a sta tionary element, a piston-rod and a valve actuator disposed in planes substantially parallel to said element, a rectilinearly re'- ciprocatable member mounted on said stationary element, a rocking member connected 7 to the valve actuator and to said reciprccatable member, a sliding gudgeon carried by the latter, a valve actuating lever fulcrumed on said stationary element and in operative connection with said piston-rod, rocking member and gudgeon and means preventing movement of said reciprocating member until its gudgeon reaches its eatreme limits of movement.

6. In valve actuating mechanism for fluid pressure motors, tionary element capable of supporting the motor, a pistonrod and a valve actuator disposed in planes substantially parallel to saidelement, a rectilinearly reciprocatable member mounted on said stationary element, a sliding gudgeon carried by the latter, a

rocking member connected to the valve actuator and. to said reciprocatable member and a valveactuating lever fulcrumed on said statlonary element and 1n operative connection with the piston rod, rec procatable member and rocking member whereby the movement of the piston-rod causes firstly a movethe combination of a sta;

ment of the rocking member away from the piston-rod, followed by a sliding movement of the gudgeon and a similar movement of the reciprocatable member resulting in said rocking member assuming a position in its original plane but remote from its initial position.

' In witness whereof I have signed, this specification in the presence of two Witnesses.

, THOMAS WINTER NICHOLS. \Vitnesses:

' T. J. WA'rsoN,

C, S. GARDNER. 

